13+ Common Entrance · Topic guide

Maths: Full Practice Paper (Core, Calculator, Set 6)

This full-length, ISEB-style 13+ Common Entrance Core Maths paper allows a calculator and provides a sixth complete set of Core-specification questions, testing the same range of content as the other Calculator papers, number and calculation, fractions, decimals and percentages, ratio and proportion, algebra, geometry and measures, and statistics and probability, with an emphasis on choosing the right calculation and using the calculator accurately.

Year 7-8 (13+)MathsISEB

Method

  1. Before calculating, decide whether the question needs an exact answer, a rounded answer, or an answer given to a stated number of decimal places or significant figures.
  2. For compound measures such as speed, density or rate, write down the formula in words first, then substitute the numbers given in the question.
  3. When a question describes a percentage increase or decrease, convert it to a single decimal multiplier before calculating, rather than finding the percentage and then adding or subtracting it as a separate step.
  4. Use the calculator to check arithmetic you have already done by another method, rather than only for new calculations, to catch transcription errors.
  5. For statistics questions, such as finding a mean, add all the values carefully before dividing, double-checking the total on the calculator.
  6. Present your final answer clearly with the correct units, and re-read the question to confirm you have rounded to the accuracy requested.

Worked example

Over 5 matches, a football team scores 2, 0, 3, 1 and 4 goals. (a) Work out the mean number of goals scored per match. (b) In the next match the team scores 6 goals. Work out the new mean for all 6 matches.

  1. Add the goals scored in the first 5 matches: 2 + 0 + 3 + 1 + 4 = 10.
  2. Divide the total by the number of matches to find the mean: 10 / 5 = 2 goals per match.
  3. Add the new match's goals to the previous total: 10 + 6 = 16.
  4. Divide by the new number of matches: 16 / 6 = 2.67 (to 2 decimal places).
  5. State the final answer: the new mean is 2.67 goals per match, to 2 decimal places.

Practice questions

Type your answer and press Check to be marked straight away, or reveal the answer and mark yourself.

Q1Work out the mean of 8, 12, 15, 9 and 11.Show answer

Answer: 11 (sum = 55, and 55 / 5 = 11)

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Q2A recipe uses 3 eggs for every 240 g of flour. Work out how many grams of flour are needed for 7 eggs, at the same ratio.Show answer

Answer: 560 g (240 / 3 = 80 g per egg, and 80 x 7 = 560)

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Q3Work out 9.6 divided by 0.4.Show answer

Answer: 24

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Q4A journey of 84 km takes 1 hour 45 minutes. Work out the average speed in km/h.Show answer

Answer: 48 km/h (1 h 45 min = 1.75 h, and 84 / 1.75 = 48)

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Q5Find 3^3 + sqrt(64).Show answer

Answer: 35 (27 + 8 = 35)

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Q6A car's value depreciates from 18,000 pounds to 14,400 pounds in one year. Work out the percentage decrease.Show answer

Answer: 20% (decrease = 3600, and 3600 / 18000 = 0.2 = 20%)

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Exam-style questions

Written in the style of a 13+ Common Entrance exam paper, with a full mark scheme.

Q1[4 marks]

A rectangular swimming pool is 25 m long and 10 m wide. (a) Work out its area. (b) The pool is surrounded by a path of uniform width 2 m. Work out the total area covered by the pool and the path together.

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Q2[5 marks]

A phone contract costs 18 pounds per month plus 0.09 pounds per minute of calls made. (a) Work out the total cost in a month when 140 minutes of calls are made. (b) In a different month, the total cost is 39.60 pounds. Work out how many minutes of calls were made.

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Free printable worksheet

Want more practice on paper? Download the maths: full practice paper (core, calculator, set 6) worksheet pack - 9 pages of exam-style questions with a full mark scheme. One email opens every download in this browser for 14 days - no account, no card. Print it for personal and classroom use.

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